2 * Copyright (c) 2005 The DragonFly Project. All rights reserved.
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in
12 * the documentation and/or other materials provided with the
14 * 3. Neither the name of The DragonFly Project nor the names of its
15 * contributors may be used to endorse or promote products derived
16 * from this software without specific, prior written permission.
18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
19 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
20 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
21 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
22 * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
23 * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING,
24 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
25 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
26 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
27 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
28 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * $DragonFly: src/sys/cpu/i386/include/tls.h,v 1.2 2005/03/29 23:04:36 joerg Exp $
34 #ifndef _MACHINE_TLS_H_
35 #define _MACHINE_TLS_H_
37 #include <sys/types.h>
41 struct tls_tcb *tcb_self; /* pointer to self*/
42 void *tcb_dtv; /* Dynamic Thread Vector */
43 void *tcb_pthread; /* thread library's data*/
47 uintptr_t dtv_generation;
48 uintptr_t dtv_max_index;
49 void *dtv_offset[__ARRAY_ZERO];
52 #define RTLD_TCB_HAS_SELF_POINTER
53 #define RTLD_STATIC_TLS_ALIGN 16
54 #define RTLD_STATIC_TLS_ALIGN_MASK (RTLD_STATIC_TLS_ALIGN - 1)
55 #define RTLD_STATIC_TLS_VARIANT_II
57 /* Get the current TCB. */
58 static __inline struct tls_tcb *
64 __asm __volatile ("movl %%gs:%1, %0"
66 : "i" (__offsetof(struct tls_tcb, tcb_self)));
68 __asm __volatile ("movl %%gs:0, %0" : "=r" (self));
74 /* Get the current thread. */
75 static __inline void *
76 tls_get_curthread(void)
81 __asm __volatile ("movl %%gs:%1, %0"
83 : "i" (__offsetof(struct tls_tcb, tcb_pthread)));
85 __asm __volatile ("movl %%gs:8, %0" : "=r" (self));
92 tls_set_tcb(struct tls_tcb *tcb)
99 seg = sys_set_tls_area(0, &info, sizeof(info));
100 __asm __volatile("movl %0, %%gs" : : "r" (seg));
103 struct tls_tcb *_rtld_allocate_tls(struct tls_tcb *);
104 void _rtld_free_tls(struct tls_tcb *);
106 #endif /* !_MACHINE_TLS_H_ */